I would think that if the mast would settle because the the steel
beam deteriorating and that the shrouds would maybe become loose.
I had to replace the beam on our W42. You might want to probe the
bulkhead that supports the steel beam. One of mine was rotted and I
had to cut the cabin sole to cut out the bulkhead, grind the hull, scribe a new
bulkhead ( 3 pieces of 3/4” marine ply bonded together and screwed together
as well ) faired to the hull and glasses.
I had the mast down ( actually replaced it ) and replaced all the area above the
compression post with G10. I had a stainless I beam fabricated.